Which of the following correctly represents the decomposition of potassium chlorate to produce potassium chloride and oxygen gas? Which of the following correctly represents the decomposition of potassium chlorate to produce potassium chloride and oxygen gas?

2KClO3(s) + heat → 2KCl(s) + 3O2(g)

Explanation:

KClO3(s) + heat → KCl(s) + O2(g)

Adding coefficients so that there are 6 O atoms on both sides.

2KClO3(s) + heat → KCl(s) + 3O2(g)

Balancing K and Cl atoms, there are 2 of each on the left and 1 of each on the right.

2KClO3(s) + heat → 2KCl(s) + 3O2(g)

The equation is now balanced.

in 1783 cavendish was working with his hydrogen gas and found that when he burned it and condensed the vapor it was water. this was very significant since it disproved the greek theory of elements completely since water was not a simple substance but the product of two gases. it was lavoisier who hearing of the experiment gave cavendish's gas the name hydrogen ("water-producer") and added that hydrogen burned by combining with oxygen and that water was a hydrogen-oxygen combination.

explanation: